I decided to pass on the Kuruma zeta because Yiuchi said the mold was nearing the end of its useful lifespan. The powertrix also has hard attachment points at the tips on each side. I've read of at least two owners of the Kuruma who've had issues with the tips lifting after install. While that likely could be rectified with a different installation technique, personally I preferred the built-in bolts on the powertrix version at these potential weak spots.